Patent SG-11201805344X-A (SG)
Title: Head unit control circuit
Inventor: YAMADA TOMONORI
IPC: B41J2/14
Filed: 2016-12-22
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 29 June 2017 (29.06.2017) WIPOIPCT (10) International Publication Number WO 2017/111068 A1 (51) International Patent Classification: B41J2/01 (2006.01) B41J29/00 (2006.01) B41J2/14 (2006.01) (21) International Application Number: PCT/JP2016/088464 (22) International Filing Date: (25) Filing Language: (26) Publication Language: 22 December 2016 (22.12.2016) English English (30) Priority Data: 2015-252878 25 December 2015 (25.12.2015) JP (71) Applicant: SEIKO EPSON CORPORATION [JP/JP]; 1- 6, Shinjuku 4-chome, Shinjuku-ku, Tokyo, 1608801 (JP). (72) Inventors: YAMADA, Tomonori; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi, Nagano, 3928502 (JP). ENDO, Hironori; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi Nagano, 3928502 (JP). MATSUYAMA, Toru; c/o SEIKO EPSON CORPORATION, 3-5, Owa 3-chome, Suwa-shi Nagano, 3928502 (JP). (74) Agents: FUSE, Yukio et al.; 8th Floor, Hirata Building, 8- 16, Sarugaku-cho 2-chome, Chiyoda-ku, Tokyo, 1010064 (JP). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: HEAD UNIT CONTROL CIRCUIT TERMINAL :. : NAME (CNt) SIGNAL NAME ZN1-1 GND ZN1 I Tsig ZN1-3 GND ZN1-4 VBS-2 ZN1-5 Com-2 ZN1-6 VBS-1 ZN1-7 Com-1 ZN1-& VDD ZN1-9 CH 7N1 10 GND ZN1 11 CL 7N1-12 GND ZN1-13 Sll-1 ZN1 14 GND TERMINAL •••••NAME:-::::: (CN2) SIGNAL NAME ZN2-14 GND ZN2-13 GND ZN2-12 GND ZN2-11 Com-2 ZN2-10 VBS-2 ZN2-0 Com-1 ZN2-8 VBS-1 ZN2-7 VHV ZN2-G LAT ZN2-5 SI2-2 ZN2-4 GND 7N2-3 Sll-2 ZN2-2 GND ZN2-1 SI2-1 TERMINAL :•:•:• NAME:::.: fCN3) SIGNAL NAME ZN3-1 Sll-3 ZN3-2 GND ZN3-3 SI2-3 ZN3-4 GND ZN3-5 HT ZN3-6 NCH ZN3-7 VDD ZNJ-b VBS-4 ZN3-9 Com-4 ZN3-10 VBS-3 ZN3-11 Com-3 ZN3 12 GND ZN3-13 GND ZN3-14 GND :: TERMINAL: ::.: NAME:::.: iN4> SIGNAL NAME 7N4-14 GND ZN4-13 SI2-4 ZN4-12 GND ZN4-11 Sll-4 ZN4-10 GND ZN4-9 XH ZN4-8 GND ZN4-7 Com-4 ZN4-6 VBS-4 ZN4-5 Com-3 ZN4-4 VBS-3 ZN4-3 GND ZN4-2 NSA ZN4-1 GND 00 o o CJ o & (57) : A connection cable that electrically connects a head unit and a head unit control circuit, the head unit including: an ejecting section that includes a piezoelectric element, and can eject a liquid corresponding to displacement of the piezoelectric ele - ment, the piezoelectric element being displaced corresponding to a change in potential of a drive signal when the drive signal has been supplied to the piezoelectric element; a determination circuit that determines whether or not the piezoelectric element has a pre - determined electrical storage capability; and an ejection limit circuit that stops the supply of the drive signal to the piezoelectric ele - ment and limits the ejection of the liquid from the ejecting section when a result of the determination is negative, the head unit con­ trol circuit controlling the head unit, and being provided outside the head unit, the connection cable including: a first connection line that supplies an instruction signal to the head unit, the instruction signal being generated by the head unit control circuit, and in - structing the head unit to execute the determination; a second connection line that supplies the drive signal to the head unit, the drive signal being generated by the head unit control circuit; and a third connection line that is provided between the first connection line and the second connection line, the third connection line being smaller in potential change width than the second connection line when the ejecting section ejects the liquid.